java - HttpURLConnection process raises HTTP status 500 error -

java - HttpURLConnection process raises HTTP status 500 error -

i have client_servlet through have create a connection server_servlet .this code working fine when used single user, giving http status 500 error when tried utilize 2 users .

the next code in client_servlet url of server_servlet given in servleturl . please help create work more 1 user

if (!( request.getparameter("rfq") == null )) { string result = ""; seek { string servleturl = http://localhost:8080/trapii/retservlet_server" ; string query = "firstcurr=" + ls_firstcurr + "&secondcurr=" + ls_secondcurr + "&tenor=" + ls_tenor + "&direction="+ ls_direction + "&firstcurramt=" + ls_firstcurramt + "&rate=" + ls_price + "&trapi=" + ls_msg + "&userid=" + ls_userid + "&sessionid=" + ls_sessionid + "&rfq=rfq"; system.out.println("query string : " + query); string charencoding = "iso-8859-1"; url sendurl = new url(servleturl); system.out.println("this rfq"); //httpurlconnection conn = (httpurlconnection) sendurl.openconnection(); httpurlconnection conn = (httpurlconnection)sendurl.openconnection(); conn.setdooutput(true); conn.setrequestmethod("post"); conn.setrequestproperty("content-length", integer.tostring(query.length())); conn.getoutputstream().write(query.getbytes(charencoding)); system.out.println("going inputstream object"); inputstream inputstream = conn.getinputstream(); bufferedreader in = new bufferedreader(new inputstreamreader(inputstream)); system.out.println("reading ouput received servlet"); result = in.readline(); } grab (exception e1) { system.out.println("rfq error"); e1.printstacktrace(); } ls_msg = result; ls_sessionid = session.getid(); }

java jsp http servlets tomcat6